Setts



E. H. BRISTOL. MEASURNG ANB CONTROLLINGMECHANISM. APPLICATIDN FILED OCT. I9. 1911.

1,326,640. Patented Den. 30,1919.

2 SHEETS-SHEET I.

E. H. BRIST'L.

MEASURING AND CONTROLLING MECHANISM.

APPLICATION FILED OCT. 9' 19H.

Patented Deo. 30, 1919;

2 SHEETS-SHEET 2.

Ed'ggaz-Hripz. l 5.9%?, MM# ai UNITED. STATES PATENT oEEIoE. Encan iraxs'ioi.,` roxisono, MnsslonrisETT's, AssIeNon To THE rox-Bono coMP'ANLoE roxnono, mnssncnnsnrrs, A CORPORATION or MASSACHU- LMEASURINGAED oon'nonmne MEcHAN'Isn.

Y Specification. Letters Intent. Patented D80. 30, 1919.

Application tiled Detober 19, 1917. Serial No. 197,436.

To all/whom cancem:

Be it known that I, EDGAR H. BRISTOL, a citizen of the United States, and resident of Foxboro, in the county of'Norfolk yandv State -oi Massachusetts, have invented an Improvement in Measurin 'and 'Controlling Mechanism, of which the ollowing description, inconnection with'the accompanying drawing, is a specication, like characters on the drawings representing like parts'.

'This invention-relates to combined measuring and controlling mechanism.' In particular, my purpose is to .provide an instrument which will measure ,and indicate o r record conditions at a certain point, whichl conditions may, for example, be of pressure or of temperature, vand which instrument .Will also control the passage of fluid through a conduit, which fluid may. eitherl directly adect the conditions being-measured or con-'- trol the same through intermediate vmecha-v nisms. way of an example of my invention an instrument adapted to measurey temperature conditions and, in particular, one measuring temperature by the pressure effects thereof on a suitable pressure sensitive device, and to record these conditions on a suitable dial.

An instrument performing .these functions alone is commonly known as a recordingj which is illustratedv in the accompanying drawings wherein Figure 1 is the front elevation of the instrument; Fig. 2 is a similar viewof'the same with the door and front facel removed to show the interior; the hands or pointers which appear in Fig. 1 are broken away in this Fig. A3 is aview 'on an enlax-I'ged scale and in vertical section of a fitting ofI the pres-- mechanism therefor;`

Fig. 4; is a viewl on-a still larger scale. and with parts broken away 'of details'. o 'F-ig. v3;

sure conduit and someof' the controlling For definiteness I have chosen by Fig. 2; land,

Fig. 6 is a brltenperspective view of the. Y

,pressure sensitive device and associated mechanism.

Referring to Figs. 1' and 2, the instrument shown embodiesa suitable case 7 (Fig. 2) the front of which may -be covered y a gazed door 9 (Eig. 1) through which is:

displayed the` dial of the instrument, here at its other end to. ashaft'19 to 'which is con-.7. I'

nected the index or pen 21 which sweeps over thel chart 11, markingl the same in Well known manner. The tube 17 may be connected by a capillary pipe 23, conveniently protected b armor 24 at the exterior of the casing, wit a'bulb 26 adapted to be exposed to temperature conditions at'the point 85 Vshown assthe usual removable polar chart where it is desired to measure them. It will be understood that the bulb 26, pipe 23 yand tube 17 may be lled with Huid such as alcof hol and that the changes of vapor tension caused by changes of -temperature will act to distort the tube 17 and actuate the index 21.

The instrument here shown is adapted to control the passagev of Huid under pressure from the pipe 25 t0 the pipe 27. In other words, in the embodiment of the vinvention illustrated the llow of fluid which is controlled is from right to left viewing the drawings. It will be understood that the fluid iiow may be utilized to control other mechanisms'.

tween pipesl 25 and 27 by a fitting 'or union 29 Herein communication is provided be#l ico secured to and extending into the instru#A ment case. .As best seen in Fig. 3, the titting.,29 provides a connection between pipes" 25 and 27, including parallel passages 31A and 33 and-a connecting passage 35.l The flow of liuid through these passages 1s c ontrolled by valve mechanism `shown in' Figs.

3 and 4, and which .shall next describe. Fig. 5 is a side elevation ,ofthepressure t sensitive, vmeasuring defvic'e :embodied inthe f leading totheouteratmosphere' within the 110 4In the-passage 33 a Aport 37 is` rovided as formed in the end of a sleeve 47 carriedby a screw plug 49 and fitting the connecting passage 35. This sleeve also forms a guide for the valve carrying rod 41 as best seen in Fig. 4, the rod, however, fitting loosely therein to permit the passage of pres-- sure uid around the same from passage 3l through the opening or .port 51 in the side of sleeve 47.

The hollow valve rod 41 is carried by and communicates with an expansible diaphragm 53 herein shown as supportedl by a bracket 55 extending from fitting 29. The

parts are so designed that when the daphragm 53 is in its normal condition it is under mechanical tension, the ,valve 39. is held seated and communication is open between pipes-25 and 27. As pressure fluid ows through the tting '29, a certain amount will enter the hollow valve rod 41 at the right hand end, viewingFigs. 3 and 4, and is permitted to escape or bleed therethrough, through the diaphragm 53 and (see Fig. 2) through flexible connecting tube 57 and through an exhaust port 59 in a termi-l nal member 61 to the atmosphere within the interior of casing 7. It will be understood that the passage through the valve rod 41 is so minute that the escape of'pressure Huid does not materially aect the low;

When it is desired to interrupt the flow of pressure fluid through the ipes 25 and 27, the exhaust port 59 may e closed by means hereinatter to lbe described. The escape of pressure Huid through the valve carrying rod 41 will then expand dia` phragm 53, shitting the rod and seating `valve 43 against its seat 45, thus cutting oil the passage 33 from the passage 31, interrupting the flow of pressure iiuid to pipe 27, and permitting the luid in pipe 25 to exhaust to the atmosphere through port 37. The mechanism just described is. substantially similarto that shown and described in my application, Serial No. 873,573, -iled Nov. 23, 1914. i

l -shall next describe the means herein utilized for controlling the motor dia phragm53 and hence the valves 39 and 43. ln the present embodiment of the invention the measuring tube 17 which measures the temperature is also used as a controlling device and provides tor interrupting the flow of pressure liuid through pipes 25 and 27 when the temperature surrounding bulb 26 is atany desired point for which the Y instrument has been set. Referringto Fig.

2, it will be noted that the terminal member 6l with its exhaust port 59 communicating lwith. diaphragm 53" is located adjacent the tube-17 and a valve is provided, controlledv by the tube 17, for closing the exhaust port. 59 and thus causing the operation-'of valves 39 and 43 by the diaphragm. Herein the index `Shaft 19,1 which is turned by the tube 1'7 as-the temperature varies, is

4provided with a crank arm 63 whichcarries a laterally extending spring strip 65 adapted to slide over the face of terminal member 61 and' cover over exhaust port 59.

It will be apparent that if the parts are in the position shown in Fig. 2 and the tem- `minal member Gland the exhaust port 59 relativeto the coperating valve 65. Herein I have shown the member 61 as mounted on an arm 67, loose on shaft 19 and connected to a pointer 69 pivoted to swing about the same axial line as the hand 21 and extending in the same general direction as'the latter over the dial face of the instrument. For convenience the pointer 69 may be provided with a handle 71. The pointer 69 may be manipulated in connection with the scaleA on the chart 11 and the exhaust port 59 thereby brought into desired position of adjustment relative to its valve 65 to cause operation of the controlling mechanism at the proper moment. Conveniently thefarrangement is such that when the longitudinal axes of the hand-21 and pointer 69 are superimposed, the Apprt 59 will be closed. Thus. it will only j necessary to set the pointer 69 at the temperature on the chartv at which it is desiredV to interrupt the new of fluid through pipes 25 and 27 and when the temperature has reached that point the :flow of fluid will' automatically be interrupted. If the temperature thereafter falls, the valve- 65 will be removed from its cooperating orted element 61 and the flow of fluid will e restablished. Means are thus provided for putting any desired limit on the action ci the device.

- It will be noted that the measuring me'chanism,whether of the recording type as herein shown or sim ly of the indicating type, and the contro ling mechanisms are united in a single instrument and operated by a single responsive mechanism 17. Furthermore, the adjustment ol the parts is simple and most easily understood, as it may be elected by such means as the pointer 69 eoperating 'with the measuring scale itself.

I have described il). Considerable detail the particular embodil'nent of my invention shown in the accompanying drawings in order that theconstructlon and operation thereof might be readily understood. Iy

might be'Widely varied Without departing- -from the spirit of my invention. 10 l What I do claim and desire to secure by Letters Patent is A 1. In combination, a responsive device, a valve member movable thereby comprising a Hat spring and a cooperating member having a port-therein over which said spring slides. v v y 2. In combination, a responsive deviceya shaft` actuated thereby, a crank arm on said shaft having a flat spring extending laterally therefrom forming a valve and` a cof operating member having a po-rt therein over which saidA spring slides, Y

3. In combination, a responsive device, a shaft actuated' thereby, a crank arm on said shaft havin a lateral extension forming a lvalve, an e ement .pivoted co-axially with said shaft and a member carried thereby' having a `port over which vsaid extension v is adapted to slide.

4.` Incombination, a valve tor controlling the passage of fluid through a conduit, pres-l sure-fluid operated moving means therefor, means to control said means including a swingable arm, a ported member .carried thereby, a flexible tube between said member and said means, a `reslpsnsive device, anarm movable thereby su* tantially coaxially with said swingable arm and adapted to cooperate with said ported member to close and (pen the port therein.

n combination, a valve for controlling lthe passage of fluid through a conduit, pressure-fluidv operated' movin a responsive member, a sha by, an index carried by the shaft, means to control ,said moving means including an element rotatable about the shaft, a ported member carried thereby, a pointer rotatable with said element and adapted to perate means therefor,

' with the same dial as the index referred to, a ie'xible tube between said member and said meansjand anv arm on the shaft adapted to coperate with said member to close and open the port therein.

In testimonywhereof, I have signed my name to this specification.

EDGAR H. BRISTOL.

rotatable therei 

